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https://github.com/fkie-cad/nvd-json-data-feeds.git
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61 lines
4.6 KiB
JSON
61 lines
4.6 KiB
JSON
{
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"id": "CVE-2024-41042",
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"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"published": "2024-07-29T15:15:12.647",
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"lastModified": "2024-11-21T09:32:07.483",
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"vulnStatus": "Awaiting Analysis",
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"cveTags": [],
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_tables: prefer nft_chain_validate\n\nnft_chain_validate already performs loop detection because a cycle will\nresult in a call stack overflow (ctx->level >= NFT_JUMP_STACK_SIZE).\n\nIt also follows maps via ->validate callback in nft_lookup, so there\nappears no reason to iterate the maps again.\n\nnf_tables_check_loops() and all its helper functions can be removed.\nThis improves ruleset load time significantly, from 23s down to 12s.\n\nThis also fixes a crash bug. Old loop detection code can result in\nunbounded recursion:\n\nBUG: TASK stack guard page was hit at ....\nOops: stack guard page: 0000 [#1] PREEMPT SMP KASAN\nCPU: 4 PID: 1539 Comm: nft Not tainted 6.10.0-rc5+ #1\n[..]\n\nwith a suitable ruleset during validation of register stores.\n\nI can't see any actual reason to attempt to check for this from\nnft_validate_register_store(), at this point the transaction is still in\nprogress, so we don't have a full picture of the rule graph.\n\nFor nf-next it might make sense to either remove it or make this depend\non table->validate_state in case we could catch an error earlier\n(for improved error reporting to userspace)."
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},
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{
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"lang": "es",
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"value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: netfilter: nf_tables: prefiere nft_chain_validate nft_chain_validate ya realiza detecci\u00f3n de bucle porque un ciclo resultar\u00e1 en un desbordamiento de la pila de llamadas (ctx->level >= NFT_JUMP_STACK_SIZE). Tambi\u00e9n sigue los mapas a trav\u00e9s de ->validate callback en nft_lookup, por lo que no parece haber raz\u00f3n para iterar los mapas nuevamente. nf_tables_check_loops() y todas sus funciones auxiliares se pueden eliminar. Esto mejora significativamente el tiempo de carga del conjunto de reglas, de 23 a 12 segundos. Esto tambi\u00e9n corrige un error de bloqueo. El c\u00f3digo de detecci\u00f3n de bucle antiguo puede provocar una recursividad ilimitada: ERROR: La p\u00e1gina de protecci\u00f3n de pila de TAREA fue visitada en... Vaya: p\u00e1gina de protecci\u00f3n de pila: 0000 [#1] PREEMPT SMP KASAN CPU: 4 PID: 1539 Comm: nft No contaminado 6.10. 0-rc5+ #1 [..] con un conjunto de reglas adecuado durante la validaci\u00f3n de los almacenes de registros. No veo ninguna raz\u00f3n real para intentar verificar esto desde nft_validate_register_store(); en este punto, la transacci\u00f3n a\u00fan est\u00e1 en progreso, por lo que no tenemos una imagen completa del gr\u00e1fico de reglas. Para nf-next, podr\u00eda tener sentido eliminarlo o hacer que esto dependa de table->validate_state en caso de que podamos detectar un error antes (para mejorar el informe de errores al espacio de usuario)."
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}
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],
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"metrics": {},
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/1947e4c3346faa8ac7e343652c0fd3b3e394202f",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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},
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{
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"url": "https://git.kernel.org/stable/c/31c35f9f89ef585f1edb53e17ac73a0ca4a9712b",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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},
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{
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"url": "https://git.kernel.org/stable/c/717c91c6ed73e248de6a15bc53adefb81446c9d0",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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},
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{
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"url": "https://git.kernel.org/stable/c/8246b7466c8da49d0d9e85e26cbd69dd6d3e3d1e",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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},
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{
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"url": "https://git.kernel.org/stable/c/9df785aeb7dcc8efd1d4110bb27d26005298ebae",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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},
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{
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"url": "https://git.kernel.org/stable/c/b6b6e430470e1c3c5513311cb35a15a205595abe",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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},
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{
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"url": "https://git.kernel.org/stable/c/cd4348e0a50286282c314ad6d2b0740e7c812c24",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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},
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{
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"url": "https://git.kernel.org/stable/c/cff3bd012a9512ac5ed858d38e6ed65f6391008c",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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},
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{
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"url": "https://git.kernel.org/stable/c/9df785aeb7dcc8efd1d4110bb27d26005298ebae",
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"source": "af854a3a-2127-422b-91ae-364da2661108"
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},
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{
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"url": "https://git.kernel.org/stable/c/cff3bd012a9512ac5ed858d38e6ed65f6391008c",
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"source": "af854a3a-2127-422b-91ae-364da2661108"
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}
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]
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} |